I first heard of this play whilst reading Brian Eno's diary. It sounded interesting as it featured discussion of mathematics, including chaos theory. It was broadcast on Radio 4 as the Saturday Play last weekend. You can listen to it there for a few more days, but that page will get overwritten soon.
The Wikipedia page has some links to various articles about the play and the mathematics.
I listened to it yesterday and it was great fun. It switches between the early 19th and late 20th centuries, with both played out in the same room of a country house. The people in the later time frame are trying to work out what went on in the earlier. This gets a bit confusing in parts as the switches can be very rapid and radio lacks the visual cues as to who is speaking. It made me laugh in places due to some witty dialogue. The mathematics is not too intrusive, but made it more interesting for me. I worked out a couple of the twists before they were explained, but others caught me by surprise. I may have missed some of the subtleties, but then there is so much going on.
The acting was nothing spectacular. Fairly typical radio/stage acting where everything is overstated, as opposed to the naturalism you get in most TV. I would still be interested to see it on the stage.
On the technical front, I recorded the broadcast via my Hauppauge Freeview card using ZapDVB to set up a timed recording and convert it to Ogg Vorbis audio. I listened on my Acer n35 PDA using GSPlayer. Free software and formats all the way. The resulting audio quality was excellent.